User Manual – Rev J
CS Series
California Instruments
85
4.7.7
Waveforms Function List
The FUNCTION field available in each transient list event setup menu may be used to
dynamically switch waveforms during transient execution. This allows different waveforms to be
used during transient execution. Waveforms may be switched without the output of the source
being turned off. For three phase configurations, each phase has its own waveform list so
different waveforms may be programmed on different phases during transient execution.
Figure 4-10 illustrates the concept of using different waveforms at different steps in a transient
list. In this case, the change was programmed to occur at the zero crossing. Any phase angle
can be used to start the transient execution however. To keep the phase angle synchronization,
the dwell times have to be set to an integer number of periods. Over long periods of time, phase
synchronization may get lost due to timing skew between the waveform generator and the
transient state machine.
Figure 4-10: Switching Waveforms in a Transient List
4.7.8 Transient
Execution
Figure 4-11: TRANSIENT Menu
A transient list can be executed from the TRANSIENT menu. To start a transient list, position the
cursor on the TRAN ST field as shown in Figure 4-11 and press the ENTER key. Transients
may be aborted by pressing the ENTER key again while on the same field as the field changes
to ABORT while a transient execution is in progress. For short duration transients, this will likely
not be visible, as the transient will complete before the screen is updated. Longer duration
transients however may be aborted in this fashion.
4.7.9
Saving Transient List Programs
When the AC source is turned off, the transient list that was programmed is not automatically
retained. Thus, if you turn the unit off, you will lose your programmed transient list. However,
transient programs may be saved in nonvolatile memory for later recall. This allows multiple
transient list programs to be recalled quickly without the need to enter all parameters each time.
Transient lists are stored as part of the overall instrument front panel setup in any of the
available setup registers.
To save the transient list you created in the previous example, proceed as follows:
